If you have changed account, you have to recreate the job with new account.

Luis Martin
Moderator
SQL-Server-Performance.com

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.
Leonardo Da Vinci

This can be an involved topic generating a lot of questions. SQL BOL has a good article that covers DTS connection security...I believe it is called Package Security in DTS, or something close...and it covers SQL connection security, persistance settings, etc.

Also could it be that analysis server does not recognise the SQL Service account because eventlog reports states that SQL Service account is trying to perform administrative tasks and it does not have administrative privileges, I am thinking SQL and analysis servers needs a restart...

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.
Leonardo Da Vinci